"It's a death mask without a nose."
Mask without a nose is a key item in Resident Evil, appearing exclusively in the remake. It is mentioned in the Book of Curse as "a mask that smells no evil".
This is one of the four Death Masks needed to release the Coffin on the underground crypt. The mask is to be placed on the statue with the "A stone statue with a hole where the nose should be." localization upon examine.
This mask can be found in the Attic both during and after the fight with the Yawn.